Safari extension for iPhone, iPad and Mac
FontFlex changes the font, size, spacing and colors of any website in Safari. Set it once, and every page reads your way.
Free download · OpenDyslexic and text size are free · Pro optional
The quiet cost of hard-to-read pages
Small, thin type and tight lines make readers work harder. Many give up halfway down the page, and the words were never the problem.
The quiet cost of hard-to-read pages
Small, thin type and tight lines make readers work harder. Many give up halfway down the page, and the words were never the problem.
Change this paragraph the way FontFlex changes every website in Safari.
news.example.com
Many websites pick thin, small type with tight lines to look sleek. For readers with dyslexia, low vision or tired eyes, that styling turns a short article into hard work.
A clearer typeface, a little more space between lines and letters, and softer colors can make the same words feel calmer. The best settings are personal, so try a few.
How it works
Free on the App Store for iPhone, iPad and Mac. One download covers all three.
Open Settings › Apps › Safari › Extensions, switch on FontFlex and allow it on all websites. The app walks you through it.
Choose a font, size and spacing once. Every page you open in Safari reads that way from then on.
Who it’s for
Default web styling suits designers. FontFlex puts readers back in charge.
Switch any site to OpenDyslexic for free, or try Lexend and Atkinson Hyperlegible with Pro. Add spacing so letters stop crowding.
Set a minimum text size that every page respects, so you are not pinching and zooming on each site.
Swap glaring white pages for cream or dark backgrounds, and soften harsh text colors (Pro).
Calm, consistent typography on every site means fewer visual distractions while you read.
Browse the web in any of 1,900+ Google Fonts or your own font files (Pro).
Features
Free covers the essentials. Pro is there when you want finer control.
OpenDyslexic is free. Pro adds 1,900+ Google Fonts, system fonts like San Francisco, and your own font files.
Pick a size once. Tiny text on every site grows to match, and it stays that way next time you visit.
Adjust line height, letter spacing and font weight so words stop crowding each other.
Set text and background colors, with separate choices for dark mode. Cream backgrounds cut glare.
Use a large, clear font for news and your favorite typeface for blogs. FontFlex switches automatically.
Exclude any site in one tap from the Safari toolbar, or with Ctrl-Shift-P on a keyboard.
Drag a slider and watch sample text change as you go, before you open a single website.
One download for all three. Optional iCloud sync keeps fonts and profiles the same everywhere.
Screenshots
Reviews
“I am dyslexic and obsessed about finding the right font to read on the web… I don’t think I can imagine browsing the web without it anymore.”
★★★★★Vishuddha Thakkar, United Kingdom
“It allows me to use Atkinson Hyperlegible as the font that Safari uses to display all websites. I find that this greatly increases readability.”
★★★★★Tim from Perth, Australia
“As a visually impaired person, this is super helpful for automating making sites readable that won’t work with Reader Mode.”
★★★★★rbfrappier, United States
“The settings can be customised per website… Highly recommended and I’m really happy for the ability to read comfortably on any given website.”
★★★★★Kind Darius, Malaysia
“This is a lifesaver. Now I can easily change my font to an easy to read dyslexic font! Wonderful.”
★★★★★Dreadnox71, United States
“It helped me greatly with reading since words tend to cross each other in my eyes.”
★★★★★jakeyhachi, Singapore
Quotes from public App Store reviews.
Safari asks every text extension for permission to “read and alter webpages”, because that is how fonts get changed. FontFlex uses it only to restyle text on your device. It never tracks your browsing, never sells data and shows no ads.
From the blog
OpenDyslexic, Lexend, Atkinson Hyperlegible or plain Arial? What studies show about dyslexia fonts, why spacing matters more, and how to test them.
Safari has no setting to change the font on websites. Here are the three built-in workarounds, their limits, and how to use any font on every page.
Is dark mode easier on your eyes? What contrast research says, when cream backgrounds help, and how to change website colors in Safari on iPhone and Mac.
FAQ
Yes. The download is free, and changing text size and using the OpenDyslexic and OpenDyslexic Alta fonts are free with no time limit. Pro costs $4.99 a week, with a 3-day free trial for new subscribers, or $24.99 a year (USD; local prices vary). It unlocks Google Fonts, system fonts, colors, spacing and more.
FontFlex is a Safari extension, so it works in Safari on iPhone, iPad and Mac. It does not change text in Chrome, Firefox or in-app browsers.
It works on most websites. It cannot change text that is part of an image, a PDF or a video, and a few sites lock their styling. You can turn FontFlex off for any site in one tap.
Safari shows every text-styling extension a warning that it can “read and alter webpages”, because restyling text needs that access. FontFlex uses it only to change fonts on your device. It never tracks your browsing or sells data.
On iPhone or iPad, open Settings › Apps › Safari › Extensions, switch on FontFlex and set it to Allow on all websites. On Mac, open Safari › Settings › Extensions and tick FontFlex. The app shows you each step.
iPhone and iPad with iOS 18 or later, and Macs with macOS 15 or later. One App Store download covers all of them.
Free to download. OpenDyslexic and text size are free, with no time limit. Upgrade to Pro only if you want more.
